Baby Sister for Aubriana & Lucy, Ideas Needed

Hi! My hubbie & I are expecting our third girl in October and are having a hard time coming up with a name. We have pretty different taste (I love the classic names coming back into style and names he considers hippie-ish, while he likes more traditional, popular names). Our older girls are Aubriana & Lucy so we'd like something that flows with their names, but also has a less formal nn that will go with Aubrie & Lucy. We'd love suggestions!! Thanks so much!